The 'code of the road' at airports. Planes, inter-traffic buses, service vehicles: who has the right of way over whom
It has happened to everyone to use the interstaff buses to reach the plane from the gate or the gate from the plane. That of the [...]

It has happened to everyone to use Interstaff buses to reach the plane from the gate or the gate from the plane. The bus one (when not boarding or disembarking using a finger). Is one of the least pleasant experiences of flying, because you regularly end up squeezed like sardines and hope to get to the plane or gate as soon as possible, as the case may be.
In this article:
But no. Sometimes it happens that the bus closes its doors and then does not leave. Or that halfway through it stops, maybe even for a few minutes. You look around and don't understand why the stop. Yes, there is an airplane starting to taxi, but it is still far away and going very slowly: Why, one wonders, don't we go by bus first, which will take a moment?
Because planes, on the apron, always take precedence over whatever other vehicles share it with them. Even if they are 'still far away,' even if they are 'proceeding very slowly.' If the path of our bus is likely to conflict with the path that the plane will follow as it rolls by, the bus will stop, again and again. And so do the other service vehicles, including those carrying luggage or conducting pushback.
This is because, from the cockpit, the commander and first officer have a limited view of what is happening further down and around them. And therefore, when they get the green light from those who manage ground movements in the control tower, they move and everyone has to give them priority.
Thus, when we watch videos on social media of luggage carts, catering vans, or half-stairs crashing into an airplane, they are always to blame, even if the accident occurred as a result of sudden steering of the aircraft.
There is only one exception to this general principle: that of emergency means (ambulances and fire department vehicles) called to intervene on the track.
Each aircraft, moving on the apron and taxiways, must then strictly adhere to the instructions coming from the ground traffic controllers in the tower, which may, for example, give takeoff priority to aircraft that are seriously behind schedule or have slot restrictions at the arrival airport.
Which is the reason why, sometimes, our plane is stopped a few meters from the beginning of the runway and lets another one, or others, who had left the parking lot after ours (the principle, that is, is not 'he who rolls first starts first'...).
As for all other vehicles moving on the forecourt, the rules are the same as in the highway code In terms of signs, stop signs, precedence. So the interpista bus does not have the right of way because it is carrying humans instead of suitcases: if it has a stop sign, it has to stop and wait until all the other vehicles that have the right of way over it have passed.